Every service has an alternative, there is no need to insist on using a site that requires a private key. I don't think there can be a bigger red flag. Playing between online and offline seems risky to me, and I would definitely prefer to look for a simpler alternative.

Why weren't you suspicious that you couldn't find anything about them?
It doesn't have to be negative, sometimes even "positive" feedback can tell you a lot about a service. There are so many red flags here, it's really strange that you risked money so easily on an anonymous site.

Is there any legitimate service that requires entering private keys through a web browser?

I ja dobih 100 AML provera u besplatnom kontestu kod AML Bot, pa ih takodje stavljam na raspolaganje ako nekom bude trebalo.
Gledajuci sta se sve desava u poslednje vreme, uopste nije losa ideja proveriti AML skor koina pre slanja bilo gde, posebno na ove instant menjacnice.

You forgot that Trent is also sold. It seems that without him, Salah is just a pale shadow of the player he once was. I'm not sure how much Slot's fault is in VVD's desperate games. What he is doing this season is quite funny, but for some reason he is also mandatory in the first team.
Chelsea and Man United have good results after sacking managers, maybe Liverpool will decide on a similar step.

How is this rule interpreted if exchangers offer the option of asset swap where the user receives the same type of asset in return (probably of a different origin), but at the same time, it is not presented as a service that helps in privacy-enhancing?
This sounds like you may be present, but if you don't mention "increasing privacy" and similar terms.

For example, we have this service, which presents itself as exchangers, although it offers the option of BTC to BTC swap (probably the same with other listed currencies there).

So, as they understand what a mixer is, they obviously interpreted that they are in line with the mixer rule of the forum.

However, a couple of posts earlier may have gone beyond the scope, and emphasized that regardless of the AML flag on the client's coins, they, in return, deliver 'clean' coins.

So, if the service offers BTC to BTC instant swap, is it a mixer, and is it allowed on the forum, or is it just a matter of the way it is presented here?

Does anyone have more experience with the X network?
I wonder what would happen if I promoted Duel through my X account. Would that also risk a ban?
I'm a bit curious, but I don't want to risk an account. I've had it for 10+ years, and occasionally it earns me some money. And if I were to create a new account just for that, it would be useless without followers, plus it would be obvious for what purpose it was created, which would certainly lead to suspension.

Regardless of whether you are a 'big' or 'small' player, the casino lost one user just because of KYC requirements. I am sure that you are not the only case, and it is certainly not only at Betfury.
If you ever open a new account, you will probably be greeted by a request for KYC at some point, because of multiaccounting. 

Pa i nije bas otimacina za ovu kampanju.
Jos kad se pogleda ovaj review: https://bitcointalk.org/index.php?topic=5572394.msg66327535#msg66327535

Did you even read the last two posts before yours, or are you just spamming?

KYC is not because of $11, but because of the suspicion of violating the rules.
The user will be allowed to withdraw the amount he has on the account if he does not want to go through KYC.

The user himself confirmed that he had received a clear explanation of what it was all about.

Considering that the KYC request has already been initiated, according to the rules of the casino, the user has a period of 30 days, after which it may happen that his account is permanently closed.

Slot #: 8